You type a plain English sentence and get back an image of about one megapixel, at the aspect ratio you pick. So far it looks like any other image generator. The difference is in how the picture is made: most generators work on a compressed version of the image and rely on a separate decoder to turn it into pixels, and that is where fine texture tends to get smoothed away. Iris-3B outputs every pixel itself, so skin, fabric and stone keep their grain.
The second half is the interesting part. The team took the same 3 billion parameter model, fine-tuned it without changing its design, and it turned into a general vision model. Give it a photo and it returns a depth map, showing what is near and what is far. Give it a small or degraded photo and it returns a restored version at four times the size. Both run from a single picture in one pass, no prompt needed.